comparison data/model/WritableWaveFileModel.h @ 0:fc9323a41f5a

start base : Sonic Visualiser sv1-1.0rc1

+/* -*- c-basic-offset: 4 indent-tabs-mode: nil -*-  vi:set ts=8 sts=4 sw=4: */
+
+/*
+    Sonic Visualiser
+    An audio file viewer and annotation editor.
+    Centre for Digital Music, Queen Mary, University of London.
+    This file copyright 2006 QMUL.
+    
+    This program is free software; you can redistribute it and/or
+    modify it under the terms of the GNU General Public License as
+    published by the Free Software Foundation; either version 2 of the
+    License, or (at your option) any later version.  See the file
+    COPYING included with this distribution for more information.
+*/
+
+#ifndef _WRITABLE_WAVE_FILE_MODEL_H_
+#define _WRITABLE_WAVE_FILE_MODEL_H_
+
+#include "WaveFileModel.h"
+
+class WavFileWriter;
+class WavFileReader;
+
+class WritableWaveFileModel : public RangeSummarisableTimeValueModel
+{
+    Q_OBJECT
+
+public:
+    WritableWaveFileModel(size_t sampleRate, size_t channels, QString path = "");
+    ~WritableWaveFileModel();
+
+    /**
+     * Call addSamples to append a block of samples to the end of the
+     * file.  Caller should also call setCompletion to update the
+     * progress of this file, if it has a known end point, and should
+     * call setCompletion(100) when the file has been written.
+     */
+    virtual bool addSamples(float **samples, size_t count);
+    
+    bool isOK() const;
+    bool isReady(int *) const;
+
+    virtual void setCompletion(int completion); // percentage
+    virtual int getCompletion() const { return m_completion; }
+
+    const ZoomConstraint *getZoomConstraint() const {
+        static PowerOfSqrtTwoZoomConstraint zc;
+        return &zc;
+    }
+
+    size_t getFrameCount() const;
+    size_t getChannelCount() const { return m_channels; }
+    size_t getSampleRate() const { return m_sampleRate; }
+
+    virtual Model *clone() const;
+
+    float getValueMinimum() const { return -1.0f; }
+    float getValueMaximum() const { return  1.0f; }
+
+    virtual size_t getStartFrame() const { return 0; }
+    virtual size_t getEndFrame() const { return getFrameCount(); }
+
+    virtual size_t getValues(int channel, size_t start, size_t end,
+			     float *buffer) const;
+
+    virtual size_t getValues(int channel, size_t start, size_t end,
+			     double *buffer) const;
+
+    virtual void getRanges(size_t channel, size_t start, size_t end,
+                           RangeBlock &ranges, size_t &blockSize) const;
+
+    virtual Range getRange(size_t channel, size_t start, size_t end) const;
+
+    virtual void toXml(QTextStream &out,
+                       QString indent = "",
+                       QString extraAttributes = "") const;
+
+    virtual QString toXmlString(QString indent = "",
+				QString extraAttributes = "") const;
+
+protected:
+    WaveFileModel *m_model;
+    WavFileWriter *m_writer;
+    WavFileReader *m_reader;
+    size_t m_sampleRate;
+    size_t m_channels;
+    size_t m_frameCount;
+    int m_completion;
+};
+
+#endif
+